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Definition web: Virus

Any of various primitive, submicroscopic parasites of plants, animals, and bacteria that often cause disease. They consist essentially of a core of RNA or DNA surrounded by a protein coat. They are unable to replicate without a host cell, and so viruses are typically not considered living organisms.

Viruses are commonly detected and measured using plaque assays.

See also: Viral plaque assays


Amy A Allen | SciWeb | Immunology research analyzers